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Thermodynamic study of a novel lignite poly-generation system driven by solar energy

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  • Liu, Rongtang
  • Liu, Ming
  • Zhao, Yongliang
  • Ma, Yuegeng
  • Yan, Junjie

Abstract

A novel integrated solar-hybrid lignite upgrade and utilization system incorporating solar energy collection, lignite drying, pyrolysis, gasification, and a power generation unit is proposed in this study to promote solar energy utilization and improve energy efficiency for lignite-based power generation. Detailed analytical models based on energy, exergy, and material balance are developed and the overall system thermodynamic performance is assessed. Moreover, a comparative study between the proposed and previous systems is performed. Results of the proposed system on a typical sunny day show that net energy efficiency can reach 56.60%, which exhibits an improvement of 8.30% from the reference system; net exergy efficiency reaches 55.25%; and average and maximum energy efficiencies of the entire integrated system are 34.29% and 38.85%, respectively. Solar energy proportion can reach 74.33%, and lignite upgrading factor significantly increases to 1.79, which is a clear improvement from findings of previous studies. This result suggests that solar energy is beneficially converted into chemical energy and stored in products. The proposed concept may provide a new efficient approach to advancing solar-lignite hybridization power generation.

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  • Liu, Rongtang & Liu, Ming & Zhao, Yongliang & Ma, Yuegeng & Yan, Junjie, 2021. "Thermodynamic study of a novel lignite poly-generation system driven by solar energy," Energy, Elsevier, vol. 214(C).
    • Handle: RePEc:eee:energy:v:214:y:2021:i:c:s0360544220321824
    DOI: 10.1016/j.energy.2020.119075
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    10. Sayed, Enas Taha & Abdelkareem, Mohammad Ali & Alawadhi, Hussain & Elsaid, Khaled & Wilberforce, Tabbi & Olabi, A.G., 2021. "Graphitic carbon nitride/carbon brush composite as a novel anode for yeast-based microbial fuel cells," Energy, Elsevier, vol. 221(C).
    11. Arnaoutakis, Georgios E. & Katsaprakakis, Dimitris Al. & Christakis, Dimitris G., 2022. "Dynamic modeling of combined concentrating solar tower and parabolic trough for increased day-to-day performance," Applied Energy, Elsevier, vol. 323(C).
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